In the Linux kernel, the following vulnerability has been resolved:
s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct()
Passing MSG_PEEK flag to skb_recv_datagram() increments skb refcount (skb->users) and iucv_sock_recvmsg() does not decrement skb refcount at exit. This results in skb memory leak in skb_queue_purge() and WARN_ON in iucv_sock_destruct() during socket close. To fix this decrease skb refcount by one if MSG_PEEK is set in order to prevent memory leak and WARN_ON.
WARNING: CPU: 2 PID: 6292 at net/iucv/af_iucv.c:286 iucv_sock_destruct+0x144/0x1a0 [af_iucv] CPU: 2 PID: 6292 Comm: afiucv_test_msg Kdump: loaded Tainted: G W 6.10.0-rc7 #1 Hardware name: IBM 3931 A01 704 (z/VM 7.3.0) Call Trace: [<001587c682c4aa98>] iucv_sock_destruct+0x148/0x1a0 [af_iucv] [<001587c682c4a9d0>] iucv_sock_destruct+0x80/0x1a0 [af_iucv] [<001587c704117a32>] __sk_destruct+0x52/0x550 [<001587c704104a54>] __sock_release+0xa4/0x230 [<001587c704104c0c>] sock_close+0x2c/0x40 [<001587c702c5f5a8>] __fput+0x2e8/0x970 [<001587c7024148c4>] task_work_run+0x1c4/0x2c0 [<001587c7023b0716>] do_exit+0x996/0x1050 [<001587c7023b13aa>] do_group_exit+0x13a/0x360 [<001587c7023b1626>] __s390x_sys_exit_group+0x56/0x60 [<001587c7022bccca>] do_syscall+0x27a/0x380 [<001587c7049a6a0c>] __do_syscall+0x9c/0x160 [<001587c7049ce8a8>] system_call+0x70/0x98 Last Breaking-Event-Address: [<001587c682c4a9d4>] iucv_sock_destruct+0x84/0x1a0 [af_iucv]
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-develUpgrade kernel-libbpf-develUpgrade bpftoolUpgrade python3-perfUpgrade kernelUpgrade kernel-libbpfUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-modules-extraUpgrade kernel-headersUpgrade kernel-toolsUpgrade python3-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-modules-extra-commonUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-6.1.124-134.200 | Mar 27, 2025 | Dec 27, 2024 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Jan 13, 2025 | Dec 27, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Dec 27, 2024 |
| Ubuntu | — | Upgrade linux-image-oracle-64kUpgrade linux-image-gcpUpgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1028-gcpUpgrade linux-image-oem-22.04bUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1026-nvidia-64kUpgrade linux-image-oem-24.04Upgrade linux-image-oem-24.04bUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-oem-22.04Upgrade linux-image-oracleUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-awsUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1026-nvidiaUpgrade linux-image-6.8.0-1026-nvidia-lowlatency-64kUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.8.0-1027-azureUpgrade linux-image-oem-24.04aUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-58-lowlatencyUpgrade linux-image-6.8.0-1024-oracleUpgrade linux-image-6.8.0-58-lowlatency-64kUpgrade linux-image-gkeUpgrade linux-image-nvidia-64kUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-realtimeUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-1027-awsUpgrade linux-image-6.11.0-18-genericUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-6.8.0-1010-gkeopUpgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-azure-nvidiaUpgrade linux-image-6.8.0-1026-nvidia-lowlatencyUpgrade linux-image-6.8.0-1023-gkeUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-6.8.0-1024-oracle-64kUpgrade linux-image-ibm-classicUpgrade linux-image-genericUpgrade linux-image-azure-lts-24.04Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-ibmUpgrade linux-image-lowlatency-64kUpgrade linux-image-nvidiaUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-kvmUpgrade linux-image-6.8.0-1026-oemUpgrade linux-image-raspiUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-58-genericUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-6.8.0-1028-gcp-64kUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1027-azure-fdeUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-oem-22.04cUpgrade linux-image-aws-lts-24.04Upgrade linux-image-azureUpgrade linux-image-oem-22.04aUpgrade linux-image-oem-22.04dUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-nvidia-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-58-generic-64kUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.11.0-1009-awsUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-6.8.0-1024-ibmUpgrade linux-image-6.8.1-1020-realtimeUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-azure-fdeUpgrade linux-image-nvidia-lowlatency | Feb 20, 2025 | Dec 27, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 9, 2025 | Dec 27, 2024 |
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